jennifer aniston stars in the new movie "we are the millers" and bares that incredibly toned body. How does she keep this bod so fit? Yo yogalosophy. We have the details for you. Reporter: She's the hottest star on the red carpet. A celebrity whose every haircut is documented and easy sense of style emulated and then, of course, there's that stunning silhouette. Now jennifer aniston's secret to staying so beautiful is rolled out in yogaosophy, 28-day program by this woman. It's yoga paired with toning exercises so people bored by yoga might try it or people into yoga might get a little extra workout. Reporter: I found out that little extra is challenging. This is really difficult already. Yes. Reporter: It's these killer moves en credits for his physique. My thighs are burning. She and I do it three times a week. That's a good baseline for anything you're warranting to do regularly. Reporter: Her favorite pose, the tree. She's really good at it. Be able to find your sense of focus in the middle of a lot that's going on. Reporter: This is how jen gets those abs. This is all core. At the core of the fitness philosophy are five objectives. Love your body. Focus on the best. Reporter: Set short-term goals. I do three or four sets. Reporter: Make healthy choices. Oh, girl, we are going to have to battle for this avocado because I love some avocado. Visualize your best. I feel graceful. Yes. Reporter: Give and receive support. Oh, my gosh, people think you must work out all the time. She's just really, really consistent. Reporter: Is yoga alone enough? Once you start sdreling that mindfulness and sense of connection to your body you just want to make healthier choices. Reporter: Like what we eat. Look, we're behind the scenes, behind the scenes at "gma." This is the perfect snack. Reporter: Looks like our sound man read the book. Manny says yoga completes a well-balanced life. I don't consider yoga a replacement for cardiovascular exercise. I think that's important. Namaste. For "good morning america," rachel smith, abc news, los angeles.

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